acronym |
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QAM
: quadrature amplitude modulation : a modulation scheme
which conveys data by changing (modulating) the amplitude of two
carrier waves, usually sinusoids which are out of phase with each
other by 90° (called quadrature carriers). In digital QAM, the sets
of modulated amplitudes and selected phases of two carrier waves are
used to transmit some binary numeral; then each signal transmitted
can carry two or more bits (as many as 256 in 256-QAM modulation). |
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Latin
acronym |
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QED
: quod erat demonstrandum : which was to be demonstrated |
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Latin
acronym |
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QEF
: quod erat faciendum : which was to be constructed |
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geography
: physical |
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quad
: quadrangle : a four-sided area bounded by two lines of
latitude (parallels) and two lines of longitude (meridians) on a
map; the area shown on one of the standard topographic map sheets
published by the US Geological Survey is approximately 17 miles (27
km) north to south and from 11 to 15 miles (17 to 24 km) east to
west. |
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Latin
abbreviation |
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q.v.
: quod vide : which see |
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Latin
noun phrase |
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quid
pro quo : something for something |
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